CN108819573A - A kind of picture circle equipment of mathematical education - Google Patents
A kind of picture circle equipment of mathematical education Download PDFInfo
- Publication number
- CN108819573A CN108819573A CN201810820913.6A CN201810820913A CN108819573A CN 108819573 A CN108819573 A CN 108819573A CN 201810820913 A CN201810820913 A CN 201810820913A CN 108819573 A CN108819573 A CN 108819573A
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- China
- Prior art keywords
- block
- rotating
- fixedly installed
- plate
- positioning column
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L9/00—Circular curve-drawing or like instruments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/001—Mathematical drawing instruments
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- Electrically Operated Instructional Devices (AREA)
- Toys (AREA)
Abstract
The invention discloses a kind of picture of mathematical education circle equipment, picture circle equipment includes mounting plate, rotation hole is offered on the mounting plate, rotating block is rotatably equipped in rotation hole, the bottom of rotating block extends to the lower section of mounting plate and is rotatably equipped with positioning column, shifting chute is offered at the top of the positioning column, movable plate is slidably fitted in shifting chute, the first fixture block is fixedly installed at the top of movable plate, the bottom of the rotating block offers the first card slot, first fixture block is mutually clamped with the first card slot, the bottom of the movable plate is fixedly installed with rack gear, the mounting hole being connected with shifting chute is offered on positioning column, rotating bar is rotatably equipped in the mounting hole, the outside fixing sleeve of rotating bar is equipped with the gear being located in shifting chute.Picture circle equipment of the invention realizes the folding to positioning column by the movement to the first fixture block, and by the movement to the second fixture block, can fold to rotating plate, be convenient for carrying, easy to operate.
Description
Technical field
The present invention relates to draw circle equipment technical field, the picture circle equipment of specially a kind of mathematical education.
Background technique
Currently, a variety of auxiliary devices are applied in mathematical education, such as：Compasses, ruler, protractor, calculator etc.,
Compasses are in mathematical education, and a kind of essential picture circle auxiliary device, traditional compasses have common compasses, bow-spring compasses, point
Compasses, trammel, old-fashioned compasses, propelling pencil compass and heart bow compasses living etc., existing compasses are when in use, it is necessary first to use ruler
Son measure compasses needle point between pen tip at a distance from, this is radius；Then needle tip alignment is needed to the center point of picture circle；Finally use
Two fingers rotate the shaft of upper end, so that pen tip is rotated a circle around needle point and draw circle ,] still, existing compasses are actually drawing bowlder, by
Cannot be disposable rotating shaft one week in finger, therefore can not disposably draw an entire circle, due to continuing after hand-off turn, this
There are problems that causing picture radius of circle to change due to hand-off during a, and existing traditional compasses are due to using needle point
It is positioned, so center of circle positioning can not be carried out on smooth hard surface or picture circle can not be carried out, is retrieved, applied
Numbers 201710296311.0 patent document discloses a kind of mathematics aided education device, and effective solution cannot be disposable
Complete picture circle, radius are easy to happen variation and smooth hard surface and cannot draw the problems such as round；Its technical solution solved is to include
Support frame, support frame have interior edge, there is sealing plate on support frame, and there are crossbeam in support frame two sides, and stabilizer blade, edge in support frame are connected on crossbeam
On be placed with rotating cylinder, have pilot pin in rotating cylinder, pilot pin is fixed on sealing plate, has shaft in rotating cylinder, there is the first ratchet in shaft
And first gear, the first ratchet have third gear outside the first ratchet, there is the first pawl on third gear above first gear,
The engagement of first ratchet outer gear ring, first gear engage second gear, have the second ratchet in second gear, have second in second gear
Pawl, the second ratchet connect rotating cylinder, radius regulating mechanism are arranged outside rotating cylinder, is equipped with drawing pen on radius regulating mechanism；This
Inventive structure is ingenious, simple and practical, radius is accurate, adaptation is various makees plan, but this device is not easy to be folded, no
It is convenient for carrying, therefore we have proposed a kind of picture of mathematical education circle equipment, for solving the above problems.
Summary of the invention
In view of the above problems, picture circle equipment can be solved effectively the present invention provides a kind of picture of mathematical education circle equipment
It is certainly not easy to be folded in background technique, is not easy to the problem of being carried, be able to carry out folding, be convenient for carrying.
To achieve the above object, the present invention provides the following technical solutions：
A kind of picture circle equipment of mathematical education, picture circle equipment includes mounting plate, offers rotation hole on the mounting plate,
Rotating block is rotatably equipped in rotation hole, the bottom of rotating block extends to the lower section of mounting plate and is rotatably equipped with positioning column, institute
It states and offers shifting chute at the top of positioning column, movable plate is slidably fitted in shifting chute, is fixedly installed at the top of movable plate
One fixture block, the bottom of the rotating block offer the first card slot, and the first fixture block is mutually clamped with the first card slot, the bottom of the movable plate
Portion is fixedly installed with rack gear, and the mounting hole being connected with shifting chute is offered on positioning column, is rotatably equipped in the mounting hole
Rotating bar, the outside fixing sleeve of rotating bar are equipped with the gear being located in shifting chute, and wheel and rack is meshed, the bottom of the rack gear
Portion is fixedly installed with loading plate, and the side of loading plate extends to the outside of positioning column；
Rotating plate is rotatably equipped on the outside of the positioning column, rotating plate is located at the lower section of shifting chute, and the bottom of the rotating plate is opened
Equipped with sliding slot, sliding block is slidably fitted in sliding slot, the bottom of sliding block is fixedly installed with placement block, and the bottom for placing block, which offers, puts
Slot is set, fixing seat is fixedly installed on the positioning column, fixed seating offers at the top of the lower section of rotating plate, the fixing seat
Groove is slidably fitted with sliding panel in groove, and the side of sliding panel extends to the outside of fixing seat and is fixedly installed with connecting rod,
Connecting rod is located at the outside of positioning column, and the top of the connecting rod is fixedly connected with the bottom of loading plate, the top of the sliding panel
Portion is fixedly installed with the second fixture block, and the bottom of rotating plate offers the second card slot, and the second fixture block is mutually clamped with the second card slot.
As a preferred technical solution of the present invention, bearing, the outer ring of bearing and rotation hole are equipped in the rotation hole
Inner wall be fixedly connected, be fixedly attached on the outside of the inner ring and rotating block of bearing, the upper of mounting plate extended at the top of rotating block
Side is simultaneously fixedly installed with knob.
As a preferred technical solution of the present invention, cylindrical groove, cylindricality are offered on the side inner wall of the shifting chute
Cylindricality block is rotatably equipped in slot, the side of cylindricality block is fixedly connected with one end of rotating bar, and the other end of the rotating bar is solid
Dingan County is equipped with spill spin block, and spill spin block is located at the outside of positioning column.
As a preferred technical solution of the present invention, slide opening is offered on the positioning column, the side of loading plate is run through
Slide opening.
As a preferred technical solution of the present invention, the side of the fixing seat offers rectangular opening, rectangular opening with it is recessed
Slot is connected, and rectangular opening is run through in the side of sliding panel, is fixedly installed with slide bar in rectangular opening, sliding panel is connect with sliding bar.
As a preferred technical solution of the present invention, the side for placing block is fixedly installed with pointer, and the one of rotating plate
Side is fixedly installed with graduated scale, and pointer is matched with graduated scale.
As a preferred technical solution of the present invention, the side for placing block offers threaded hole, spiral shell in threaded hole
Line is equipped with bolt, and one end of bolt extends in placing groove.
As a preferred technical solution of the present invention, the same sliding is fixedly installed on the two sides inner wall of the sliding slot
Bar, sliding block are slidably connected with sliding bar.
Compared with prior art, the beneficial effects of the invention are as follows：
It is matched by movable plate, the first fixture block, the first card slot, rack gear, rotating bar, gear and spill spin block, passes through rotation
Block drives rotating bar to be rotated, and is rotated by rotating bar band moving gear, is moved downwards by gear band carry-over bar,
It is moved by rack drives movable plate, drives the first fixture block to be moved by movable plate, the first fixture block is made to be detached from first
Card slot；
It is matched by rack gear, sliding panel, the second fixture block, the second card slot, connecting rod and loading plate, is held by rack drives
Support plate is moved downwards, drives connecting rod to be moved by loading plate, drives sliding panel to be moved downwards by connecting rod
It is dynamic, drive the second fixture block to be detached from the second card slot by sliding panel；
The picture circle equipment of mathematical education of the invention realizes the folding to positioning column by the movement to the first fixture block, and
By the movement to the second fixture block, rotating plate can be folded, be convenient for carrying, it is easy to operate.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the picture circle equipment of mathematical education proposed by the present invention；
Fig. 2 is a kind of structural schematic diagram of the part A of the picture circle equipment of mathematical education proposed by the present invention；
Fig. 3 is a kind of structural schematic diagram of the part B of the picture circle equipment of mathematical education proposed by the present invention；
Fig. 4 is a kind of structural schematic diagram of the C portion of the picture circle equipment of mathematical education proposed by the present invention；
Fig. 5 is the three-dimensional knot that a kind of movable plate of the picture circle equipment of mathematical education proposed by the present invention is connect with the first fixture block
Structure schematic diagram.
In figure：1- mounting plate, 2- rotation hole, 3- rotating block, 4- positioning column, 5- shifting chute, 6- movable plate, 7- first block
Block, the first card slot of 8-, 9- rack gear, 10- mounting hole, 11- rotating bar, 12- gear, 13- spill spin block, 14- rotating plate, 15- sliding slot,
16- sliding block, 17- place block, 18- placing groove, 19- pointer, 20- graduated scale, 21- fixing seat, 22- groove, 23- sliding panel, 24-
Second fixture block, the second card slot of 25-, 26- connecting rod, 27- threaded hole, 28- bolt, 29- loading plate.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment：
Fig. 1-5 is please referred to, the present invention provides a kind of technical solution：
A kind of picture circle equipment of mathematical education, picture circle equipment includes mounting plate 1, and rotation hole 2 is offered on mounting plate 1,
Rotating block 3 is rotatably equipped in rotation hole 2, the bottom of rotating block 3 extends to the lower section of mounting plate 1 and is rotatably equipped with positioning column
4, the top of positioning column 4 offers shifting chute 5, and movable plate 6 is slidably fitted in shifting chute 5, and the top of movable plate 6 is fixedly mounted
There is the first fixture block 7, the bottom of rotating block 3 offers the first card slot 8, and the first fixture block 7 is clamped with 8 phase of the first card slot, movable plate 6
Bottom is fixedly installed with rack gear 9, and the mounting hole 10 being connected with shifting chute 5 is offered on positioning column 4, rotation peace in mounting hole 10
Equipped with rotating bar 11, the outside fixing sleeve of rotating bar 11 is equipped with the gear 12 being located in shifting chute 5, and gear 12 is nibbled with 9 phase of rack gear
It closes, the bottom of rack gear 9 is fixedly installed with loading plate 29, and the side of loading plate 29 extends to the outside of positioning column 4；
The outside of positioning column 4 is rotatably equipped with rotating plate 14, and rotating plate 14 is located at the lower section of shifting chute 5, and the bottom of rotating plate 14 is opened
Equipped with sliding slot 15, sliding block 16 is slidably fitted in sliding slot 15, the bottom of sliding block 16, which is fixedly installed with, places block 17, places block 17
Bottom offers placing groove 18, and fixing seat 21 is fixedly installed on positioning column 4, and fixing seat 21 is located at the lower section of rotating plate 14, fixed
The top of seat 21 opens up fluted 22, sliding panel 23 is slidably fitted in groove 22, the side of sliding panel 23 extends to fixing seat
21 outside is simultaneously fixedly installed with connecting rod 26, and connecting rod 26 is located at the outside of positioning column 4, the top of connecting rod 26 and loading plate
29 bottom is fixedly connected, and the top of sliding panel 23 is fixedly installed with the second fixture block 24, and the bottom of rotating plate 14 offers the second card
Slot 25, the second fixture block 24 are clamped with 25 phase of the second card slot, pass through movable plate 6, the first fixture block 7, the first card slot 8, rack gear 9, rotation
Bar 11, gear 12 and spill spin block 13 match, and drive rotating bar 11 to be rotated by spill spin block 13, are driven by rotating bar 11
Gear 12 is rotated, and is moved downwards by gear 12 with carry-over bar 9, drives movable plate 6 to be moved by rack gear 9,
By movable plate 6 drive the first fixture block 7 moved, make the first fixture block 7 be detached from the first card slot 8, by rack gear 9, sliding panel 23,
Second fixture block 24, the second card slot 25, connecting rod 26 and loading plate 29 match, and drive loading plate 29 to carry out downwards by rack gear 9
It is mobile, it drives connecting rod 26 to be moved by loading plate 29, drives sliding panel 23 to be moved downwards by connecting rod 26, lead to
Crossing sliding panel 23 drives the second fixture block 24 to be detached from the second card slot 25, and the picture circle equipment of mathematical education of the invention to first by blocking
The folding to positioning column 4 is realized in the movement of block 7, and by the movement to the second fixture block 24, can be folded to rotating plate 14,
It is convenient for carrying, it is easy to operate.
In the present embodiment, bearing is equipped in rotation hole 2, the outer ring of bearing is fixedly connected with the inner wall of rotation hole 2, bearing
The outside of inner ring and rotating block 3 is fixedly attached, and the top of rotating block 3 extends to the top of mounting plate 1 and is fixedly installed with knob,
Cylindrical groove is offered on the side inner wall of shifting chute 5, and cylindricality block, the side of cylindricality block and rotating bar are rotatably equipped in cylindrical groove
11 one end is fixedly connected, and the other end of rotating bar 11 is fixedly installed with spill spin block 13, and spill spin block 13 is located at the outer of positioning column 4
Side offers slide opening on positioning column 4, and slide opening is run through in the side of loading plate 29, and the side of fixing seat 21 offers rectangular opening, rectangle
Hole is connected with groove 22, and rectangular opening is run through in the side of sliding panel 23, and slide bar, sliding panel 23 and cunning are fixedly installed in rectangular opening
Bar is slidably connected, and the side for placing block 17 is fixedly installed with pointer 19, and the side of rotating plate 14 is fixedly installed with graduated scale 20, pointer
19 match with graduated scale 20, and the side for placing block 17 offers threaded hole 27, and 27 internal screw thread of threaded hole is equipped with bolt 28, spiral shell
One end of bolt 28 extends in placing groove 18, is fixedly installed with the same sliding bar on the two sides inner wall of sliding slot 15, sliding block 16 with
Sliding bar is slidably connected, and passes through movable plate 6, the first fixture block 7, the first card slot 8, rack gear 9, rotating bar 11, gear 12 and spill spin block
13 match, and drive rotating bar 11 to be rotated by spill spin block 13, are rotated, passed through with moving gear 12 by rotating bar 11
Gear 12 is moved downwards with carry-over bar 9, drives movable plate 6 to be moved by rack gear 9, drives first by movable plate 6
Fixture block 7 is moved, and so that the first fixture block 7 is detached from the first card slot 8, is passed through rack gear 9, sliding panel 23, the second fixture block 24, the second card slot
25, connecting rod 26 and loading plate 29 match, and drive loading plate 29 to be moved downwards by rack gear 9, pass through 29 band of loading plate
Dynamic connecting rod 26 is moved, and drives sliding panel 23 to be moved downwards by connecting rod 26, drives second by sliding panel 23
Fixture block 24 is detached from the second card slot 25, and the picture circle equipment of mathematical education of the invention is realized by the movement to the first fixture block 7 to fixed
The folding of position column 4, and by the movement to the second fixture block 24, rotating plate 14 can be folded, be convenient for carrying, operation side
Just.
The working principle of the invention：
When that need to be carried, rotating bar 11 is driven to be rotated by spill spin block 13, by rotating bar 11 with moving gear
12 are rotated, and are moved downwards by gear 12 with carry-over bar 9, are driven movable plate 6 to be moved by rack gear 9, are passed through
Movable plate 6 drives the first fixture block 7 to be moved, and the first fixture block 7 is made to be detached from the first card slot 8, at the same time, can be with by rack gear 9
It drives loading plate 29 to be moved downwards, drives connecting rod 26 to be moved by loading plate 29, driven and slided by connecting rod 26
Movable plate 23 is moved downwards, is driven the second fixture block 24 to be detached from the second card slot 25 by sliding panel 23, is then carried out to positioning column 4
It folds, then rotating plate 14 is folded again, placing groove 18 is used to place chalk, can be consolidated to chalk by bolt 28
It is fixed.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of picture circle equipment of mathematical education, picture circle equipment includes mounting plate (1), which is characterized in that the mounting plate (1)
On offer rotation hole (2), is rotatably equipped with rotating block (3) in rotation hole (2), the bottom of rotating block (3) extends to mounting plate
(1) lower section is simultaneously rotatably equipped with positioning column (4), is offered shifting chute (5) at the top of the positioning column (4), in shifting chute (5)
It is slidably fitted with movable plate (6), is fixedly installed at the top of movable plate (6) the first fixture block (7), the bottom of the rotating block (3)
It offers the first card slot (8), the first fixture block (7) is mutually clamped with the first card slot (8), and the bottom of the movable plate (6) is fixedly mounted
Have rack gear (9), the mounting hole (10) being connected with shifting chute (5), rotation in the mounting hole (10) are offered on positioning column (4)
It is equipped with rotating bar (11), the outside fixing sleeve of rotating bar (11) is equipped with the gear (12) being located in shifting chute (5), gear (12)
It is meshed with rack gear (9), the bottom of the rack gear (9) is fixedly installed with loading plate (29), and the side of loading plate (29) extends to
The outside of positioning column (4)；
It being rotatably equipped with rotating plate (14) on the outside of the positioning column (4), rotating plate (14) is located at the lower section of shifting chute (5), and described turn
The bottom of plate (14) offers sliding slot (15), is slidably fitted with sliding block (16) in sliding slot (15), the fixed peace in the bottom of sliding block (16)
Equipped with block (17) are placed, the bottom for placing block (17) is offered placing groove (18), is fixedly installed with fixation on the positioning column (4)
Seat (21), fixing seat (21) are located at the lower section of rotating plate (14), open up fluted (22), groove at the top of the fixing seat (21)
(22) it is slidably fitted with sliding panel (23) in, the side of sliding panel (23) extends to the outside of fixing seat (21) and is fixedly installed with
Connecting rod (26), connecting rod (26) are located at the outside of positioning column (4), the top of the connecting rod (26) and the bottom of loading plate (29)
Portion is fixedly connected, and is fixedly installed with the second fixture block (24) at the top of the sliding panel (23), and the bottom of rotating plate (14) offers
Two draw-in groove (25), the second fixture block (24) are mutually clamped with the second card slot (25).
2. the picture circle equipment of mathematical education according to claim 1, it is characterised in that：
Bearing is equipped in the rotation hole (2), the outer ring of bearing is fixedly connected with the inner wall of rotation hole (2), the inner ring of bearing and
Rotating block is fixedly attached on the outside of (3), and the top of mounting plate (1) is extended at the top of rotating block (3) and is fixedly installed with knob.
3. the picture circle equipment of mathematical education according to claim 1, it is characterised in that：
Cylindrical groove is offered on the side inner wall of the shifting chute (5), is rotatably equipped with cylindricality block in cylindrical groove, the one of cylindricality block
Side is fixedly connected with the one end of rotating bar (11), and the other end of the rotating bar (11) is fixedly installed with spill spin block (13), rotation
Block (13) is located at the outside of positioning column (4).
4. the picture circle equipment of mathematical education according to claim 1, it is characterised in that：
Slide opening is offered on the positioning column (4), slide opening is run through in the side of loading plate (29).
5. the picture circle equipment of mathematical education according to claim 1, it is characterised in that：
The side of the fixing seat (21) offers rectangular opening, and rectangular opening is connected with groove (22), the side of sliding panel (23)
Slide bar is fixedly installed in rectangular opening, rectangular opening, sliding panel (23) is connect with sliding bar.
6. the picture circle equipment of mathematical education according to claim 1, it is characterised in that：
The side for placing block (17) is fixedly installed with pointer (19), and the side of rotating plate (14) is fixedly installed with graduated scale
(20), pointer (19) is matched with graduated scale (20).
7. the picture circle equipment of mathematical education according to claim 1, it is characterised in that：
The side for placing block (17) offers threaded hole (27), and threaded hole (27) internal screw thread is equipped with bolt (28), bolt
(28) one end extends in placing groove (18).
8. the picture circle equipment of mathematical education according to claim 1, it is characterised in that：
The same sliding bar is fixedly installed on the two sides inner wall of the sliding slot (15), sliding block (16) is slidably connected with sliding bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810820913.6A CN108819573B (en) | 2018-07-24 | 2018-07-24 | Circle drawing equipment for mathematical education |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810820913.6A CN108819573B (en) | 2018-07-24 | 2018-07-24 | Circle drawing equipment for mathematical education |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108819573A true CN108819573A (en) | 2018-11-16 |
| CN108819573B CN108819573B (en) | 2020-07-17 |
Family
ID=64140345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810820913.6A Active CN108819573B (en) | 2018-07-24 | 2018-07-24 | Circle drawing equipment for mathematical education |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108819573B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109278446A (en) * | 2018-11-27 | 2019-01-29 | 烟台职业学院 | A kind of dedicated plotting unit of higher mathematics |
| CN109637298A (en) * | 2019-01-11 | 2019-04-16 | 崔洋 | Rotational stiffness visualization device for Teaching of Structural Mechanics |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4567662A (en) * | 1983-08-30 | 1986-02-04 | Peter Wallner | Device for drawing ellipses |
| CN201201442Y (en) * | 2008-05-16 | 2009-03-04 | 岳治奎 | Compasses for teaching |
| CN201432519Y (en) * | 2009-06-30 | 2010-03-31 | 张海阳 | Labor-saving compass |
| CN202011277U (en) * | 2011-04-22 | 2011-10-19 | 杨楚原 | Multifunctional teaching compasses |
| CN107139613A (en) * | 2017-04-28 | 2017-09-08 | 郑州航空工业管理学院 | A kind of mathematics aided education device |
-
2018
- 2018-07-24 CN CN201810820913.6A patent/CN108819573B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4567662A (en) * | 1983-08-30 | 1986-02-04 | Peter Wallner | Device for drawing ellipses |
| CN201201442Y (en) * | 2008-05-16 | 2009-03-04 | 岳治奎 | Compasses for teaching |
| CN201432519Y (en) * | 2009-06-30 | 2010-03-31 | 张海阳 | Labor-saving compass |
| CN202011277U (en) * | 2011-04-22 | 2011-10-19 | 杨楚原 | Multifunctional teaching compasses |
| CN107139613A (en) * | 2017-04-28 | 2017-09-08 | 郑州航空工业管理学院 | A kind of mathematics aided education device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109278446A (en) * | 2018-11-27 | 2019-01-29 | 烟台职业学院 | A kind of dedicated plotting unit of higher mathematics |
| CN109637298A (en) * | 2019-01-11 | 2019-04-16 | 崔洋 | Rotational stiffness visualization device for Teaching of Structural Mechanics |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108819573B (en) | 2020-07-17 |
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